-
Journal of Clinical Pathology Jun 2020Paraneoplastic leukemoid reaction (PLR) is the extreme leukocytosis that occurs due to a non-haematolymphoid cytokine-secreting tumour (CST) in the absence of bone... (Review)
Review
Paraneoplastic leukemoid reaction (PLR) is the extreme leukocytosis that occurs due to a non-haematolymphoid cytokine-secreting tumour (CST) in the absence of bone marrow infiltration by that solid tumour. The clinical presentation is widely variable, and therefore challenging. If the underlying malignancy is not clinically apparent, PLR could be mistaken for myeloproliferative neoplasms, altering the patient's management. CSTs are highly aggressive tumours associated with a poor prognosis due to multiple mechanisms. Localising and treating the underlying malignancy is the mainstay of treatment. Both the treating clinician and the pathologist should keep a high level of suspicion for this entity in patients having unexplained leukocytosis. We herein discuss the underlying mechanisms, clinical presentation, pathological features, differential diagnosis and prognosis of this rare entity. An emphasis on the role of the pathologist is provided since the lack of knowledge on this entity can lead to dramatic effects on the patient, including unnecessary diagnostic testing and treatments.
Topics: Cytokines; Diagnosis, Differential; Humans; Leukemia, Myeloid; Leukemoid Reaction; Leukocytes; Myeloproliferative Disorders; Neoplasms; Prognosis
PubMed: 31941653
DOI: 10.1136/jclinpath-2019-206340 -
Indian Pediatrics Feb 2021
Topics: Humans; Leukemoid Reaction; Nasopharyngeal Carcinoma; Nasopharyngeal Neoplasms; Paraneoplastic Syndromes
PubMed: 33632959
DOI: No ID Found -
Cureus Mar 2021Hypersensitivity reactions to dapsone are common and potentially fatal adverse drug reactions. Herein, we report a case of a 45-year-old female who presented with fever,...
Hypersensitivity reactions to dapsone are common and potentially fatal adverse drug reactions. Herein, we report a case of a 45-year-old female who presented with fever, generalized desquamating rashes, and icterus three weeks after initiation of dapsone therapy for leprosy neuritis. She was diagnosed to have dapsone hypersensitivity syndrome (DHS) with leukemoid reaction and thrombocytosis. Dapsone was immediately discontinued, and she has treated with prednisolone 50 mg daily for a month and tapered over the next month. She has improved completely. DHS, leukemoid reaction, and severe thrombocytosis, or these adverse drug reactions to dapsone have rarely been reported.
PubMed: 33889465
DOI: 10.7759/cureus.14026 -
Cureus Dec 2023A leukemoid reaction is a rare condition characterized by an elevation in white blood cell count exceeding 50,000 cells/μL in response to severe medical conditions,...
A leukemoid reaction is a rare condition characterized by an elevation in white blood cell count exceeding 50,000 cells/μL in response to severe medical conditions, which can mimic the presentation of chronic myeloid leukemia (CML). Distinguishing between leukemoid reaction and CML depends on a thorough clinical history and comprehensive laboratory evaluation. We present a case of leukemoid reaction associated with severe diabetic ketoacidosis, where the patient's white blood cell count returned to the normal range after the correction of hyperglycemia and electrolyte imbalances.
PubMed: 38205495
DOI: 10.7759/cureus.50325 -
Cureus Sep 2021Leukemoid reaction is defined by a leukocyte level above 50 x 10/µL with a predominance of mature neutrophils and the presence of immature granulocytic forms in the...
Leukemoid reaction is defined by a leukocyte level above 50 x 10/µL with a predominance of mature neutrophils and the presence of immature granulocytic forms in the peripheral blood (left shift). We report a case of a 36-year-old woman with severe coronavirus disease 2019 (COVID-19) infection admitted to the ICU with a leukocytosis of 70.9 x 10/µL white blood cells (WBC) throughout her hospitalization. A left shift with bandemia along with toxic granulations was also noticed and further investigation excluded more commonly known causes. A presumptive diagnosis of leukemoid reaction was made secondary to COVID-19 infection; however, it could not be confirmed since workup for lymphoproliferative disorders could not be performed as the patient passed away. The leukemoid reaction could be associated with severe COVID-19 infection; however, more data are needed to evaluate this association.
PubMed: 34527502
DOI: 10.7759/cureus.17865 -
Cancer Immunology, Immunotherapy : CII Nov 2023Breast cancer is the leading malignancy in women worldwide, both in terms of incidence and mortality. Triple-negative breast cancer (TNBC) is the type with the worst...
Breast cancer is the leading malignancy in women worldwide, both in terms of incidence and mortality. Triple-negative breast cancer (TNBC) is the type with the worst clinical outcomes and with fewer therapeutic options than other types of breast cancer. GK-1 is a peptide that in the experimental model of the metastatic 4T1 breast cancer has demonstrated anti-tumor and anti-metastatic properties. Herein, GK-1 (5 mg/kg, i.v.) weekly administrated not only decreases tumor growth and the number of lung macro-metastases but also lung and lymph nodes micro-metastases. Histological analysis reveals that GK-1 reduced 57% of the intra-tumor vascular areas, diminished the leukemoid reaction's progression, and the spleens' weight and length. A significant reduction in VEGF-C, SDF-1, angiopoietin-2, and endothelin-1 angiogenic factors was induced. Moreover, GK-1 prevents T cell exhaustion in the tumor-infiltrating lymphocytes (TILs) decreasing PD-1 expression. It also increased IFN-γ and granzyme-B expression and the cytotoxic activity of CD8 TILs cells against tumor cells. All these features were found to be associated with a better antitumor response and prognosis. Altogether, these results reinforce the potential of GK-1 to improve the clinical outcome of triple-negative breast cancer immunotherapy. Translation research is ongoing towards its evaluation in humans.
Topics: Humans; Female; Animals; Mice; Triple Negative Breast Neoplasms; T-Cell Exhaustion; Lymphocytes, Tumor-Infiltrating; Prognosis; Antineoplastic Agents; CD8-Positive T-Lymphocytes
PubMed: 37736849
DOI: 10.1007/s00262-023-03538-9 -
Cancer Immunology, Immunotherapy : CII Feb 2023Paraneoplastic leukemoid reaction (PLR) is a rare phenomenon in metastasized melanoma associated with poor prognosis and rapid disease progression. Currently, no...
BACKGROUND
Paraneoplastic leukemoid reaction (PLR) is a rare phenomenon in metastasized melanoma associated with poor prognosis and rapid disease progression. Currently, no specific therapeutic options exist other than treating the underlying malignancy.
METHODS
Five cases of paraneoplastic neutrophilia in patients with advanced-stage IV melanoma were enrolled in our study. Cytokine concentrations in patients' serum samples were analyzed before and during PLR using a multiplex cytokine array. Further, immunohistochemical staining of tumor tissue biopsied during PLR was performed.
RESULTS AND CONCLUSIONS
We observed a strong correlation between worsening of tumor burden and aggravation of neutrophilia. Cytokine measurements revealed an increase of proinflammatory cytokines (IL6, IFNγ), proangiogenic cytokines (VEGF) and immune stem cell growth factors (G-CSF) during PLR. Immunohistochemistry confirmed neutrophil infiltration of tumor tissue. The presented cytokine alterations provide a basis for further functional analysis, which is necessary for the development of targeted therapeutic approaches against PLR.
Topics: Humans; Cytokines; Leukemoid Reaction; Melanoma; Leukocytosis; Granulocyte Colony-Stimulating Factor; Prognosis; Neutrophils
PubMed: 35841421
DOI: 10.1007/s00262-022-03249-7 -
Cureus Sep 2019Hyperleukocytosis is defined as a white blood cell (WBC) count of ≥ 100,000/µL. Leukostasis refers to symptomatic hyperleukocytosis and is considered a medical...
Hyperleukocytosis is defined as a white blood cell (WBC) count of ≥ 100,000/µL. Leukostasis refers to symptomatic hyperleukocytosis and is considered a medical emergency. In pediatric practice, hyperleukocytosis is most commonly described in leukemia and other myeloproliferative disorder, but other etiologies, such as infection, are less commonly mentioned. In this case report, a one-day-old, preterm, male baby (26 weeks of gestation) was referred for preterm care. A sepsis-induced leukemoid reaction hyperleukocytosis diagnosis was presumed, and he was successfully treated with an empirical antibiotic with a gradual improvement in WBC counts.
PubMed: 31700707
DOI: 10.7759/cureus.5594 -
The Journal of International Medical... Jan 2021Leukemoid reaction complicated by thrombocytopenia is rare, usually seen in patients with malignant conditions, and is often associated with poor prognosis. Here, the... (Review)
Review
Leukemoid reaction complicated by thrombocytopenia is rare, usually seen in patients with malignant conditions, and is often associated with poor prognosis. Here, the case of a 28-year-old healthy female without exceptional past medical history, who suffered from severe vaginal infection, is reported. Although symptoms improved, the white blood cell (WBC) count continued to increase up to 78 460 cells/µl, however, the patient continued to improve and the outcome was good. The case revealed that an increasing WBC count may not change in synchrony with clinical symptoms. When faced with this scenario, procalcitonin measurements may play an important role in differentiating diagnosis and guiding treatment.
Topics: Adult; Communicable Diseases; Female; Humans; Leukemoid Reaction; Leukocyte Count; Leukopenia; Thrombocytopenia
PubMed: 33423588
DOI: 10.1177/0300060520974257 -
Translational Pediatrics Dec 2022Neonatal leukemoid reaction (NLR) is often accompanied by infectious or non-infectious diseases, a low birth weight, sepsis, prematurity, ventricular hemorrhage, and...
BACKGROUND
Neonatal leukemoid reaction (NLR) is often accompanied by infectious or non-infectious diseases, a low birth weight, sepsis, prematurity, ventricular hemorrhage, and bronchial dysplasia. It has an incidence rate of 1.3-15% and a mortality rate of about 41.4%. Previous studies on NLR have largely focused on its pathogenesis and clinical cases, but little is known about its prognostic laboratory indicators. We found that some of the NLR exhibited obviously elevation in liver function tests like aspartate transaminase (AST) and lactate dehydrogenase (LDH) which were not took by all the LR infants. The necessity for liver function tests for the prognosis of NLR was still unclear.
METHODS
A total of 39 premature infants with NLR at the First Hospital of Jilin University between March 2016 and March 2017 were included in this retrospective cohort study. The infants were divided into death and cured group based on the clinical outcomes. Premature infants with LR and death were defined as the case group (n=14), while infants without death were defined as the control group (n=25). Confounding factors such as age and gender between the two groups were controlled. Blood routine tests, including the white blood cell (WBC) count and subtypes, and liver function, and clinical features were recorded and analyzed. T tests were used to examine the differences in the laboratory indicators between the NLR and control groups. Receiver operating characteristic curves (ROCs) and areas under the curve (AUCs) were used to examine laboratory indicators for prognosis.
RESULTS
For predicting clinical outcomes, the ROC curves showed that the cut-off values for AST and LDH were 279 and 1,412 U/L, respectively. The sensitivity and specificity for AST were 92% and 71.43%, respectively, with an AUC of 0.894, while the sensitivity and specificity for LDH were 88% and 78.57%, respectively, with an AUC of 0.911.
CONCLUSIONS
This innovative study investigated the NLR prognosis depending on laboratory tests. We found that serum AST and LDH levels had reliable predictive value in determining adverse outcomes of NLR.
PubMed: 36643666
DOI: 10.21037/tp-22-543